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Chapter 23: Problem 25

Some weeds are anchored by taproots. They cause problems to gardeners because they are ___. a. easy to pull up because the root system is shallow b. difficult to pull up because their taproots penetrate deep into the soil c. difficult to pull up because they are anchored by an extensive network of roots d. easy to pull up because there is not a large network to anchor the plant

Short Answer

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b

Step by step solution

01

Understand the Question

The question asks about the nature of weeds that are anchored by taproots and the challenge they present to gardeners.
02

Analyze Each Option

Evaluate each provided option to find the correct one.a. This option is incorrect because taproots are not shallow; they go deep into the soil.b. This option is correct because taproots indeed penetrate deep into the soil, making them harder to pull up.c. This option is incorrect because it is taproots, not an extensive network of roots, described in the question.d. This option is incorrect for the same reason as option a; tapping into a deep root system is not easy to pull up.
03

Conclusion

The best answer is identified through elimination and understanding the characteristics of taproots.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Taproot System
Taproot systems are a type of root structure found in many plants, including certain weeds. The distinctive feature of a taproot is its single, thick primary root that grows directly downward. This primary root can grow very deep into the soil, sometimes reaching several meters. Smaller secondary roots may branch off from the main taproot, but they are usually not as extensive as the primary root.

  • Deep penetration: Taproots can reach water sources that are inaccessible to other types of roots.
  • Nutrient access: They tap into nutrients deeper in the soil.
  • Stability: Taproots anchor the plant firmly into the ground.
Understanding these characteristics of taproots can help gardeners identify and manage weeds more effectively.
Weeds in Gardening
Weeds can cause significant challenges in gardening. They compete with garden plants for resources such as water, nutrients, and sunlight. Taproot weeds, in particular, are notorious for their resilience. Because their taproots extend deep into the soil, they are much harder to remove.

  • Competitive nature: Weeds often grow rapidly and can overcrowd other plants.
  • Resource hogs: They extract essential nutrients from the soil, depriving other plants.
  • Persistence: Taproot weeds can regenerate from root fragments left in the soil.
Effective garden maintenance practices like regular weeding, mulching, and using ground covers can help manage these persistent invaders.
Root Penetration Issues
Root penetration is a crucial factor in the growth and removal of plants. Deep-rooted weeds with taproots pose a unique challenge because they penetrate deeply into the soil. These deep roots make physical removal difficult and can cause damage to gardening tools.

  • Soil compaction: Deep root penetration can help in breaking up compacted soil.
  • Water absorption: Deep roots can access lower water tables, especially during droughts.
  • Problems in removal: Trying to pull out taproots can result in breaking the root, which may lead to regrowth.
To tackle these issues, gardeners often employ specific tools designed to reach deeper roots or use techniques such as soil loosening before attempting weed removal.

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Most popular questions from this chapter

Students are asked to sort tissue slides into simple and complex tissues. How should they recognize a complex tissue through the microscope? a. Complex tissue has a variety of cell types that fulfill different functions. b. Only complex tissue is observed in adult plants. c. Complex tissue appears only in lateral roots and branches. d. Complex tissues contain cells that are strikingly different in appearance but perform the same function.

A florist decided to paint the leaves of poinsettia with a gold paint to embellish them. The plant soon wilted and the leaves drooped. What explains this damage? a. The paint clogged the stomata. Without photosynthesis, the plant could not pull water from the soil. b. The paint clogged the stomata. Without transpiration, the plant could not pull water from the soil. c. The paint clogged the hydathodes. Without transpiration, the plant could not pull water from the soil. d. The paint clogged the stomata. Without guttation, the plant could not pull water from the soil.

A researcher intends to test the effects of several growth factors on the differentiation of plant tissue. What would be the best choice of experimental tissue? a. dermal tissue b. meristematic tissue c. vascular tissue d. ground tissue

How could the morphology of cells observed microscopically indicate that the specimen is probably simple tissue? a. Simple tissue is made of cells that have different shapes, so the specimen will show oval, polygonal, and other shapes. b. Simple tissue is made of cells that have intercellular spaces, so the specimen will contain spaces. c. Simple tissue is made of cells that are elongated and tapered, so the specimen will show elongated cells. d. Simple tissue is made of cells that are morphologically similar, so the specimen will appear uniform.

Scientists on a new project to restore a damaged salt marsh are investigating several plants that could be introduced. Plant X is considered a possible candidate. Before the decision is made, the following data are examined. Assume that the contribution of gravity and matric potential are negligible and can be ignored. Recall that the overall water potential for a system is represented by the equation: \(\Psi\) system \(=\Psi\) total \(=\Psi_{\mathrm{S}}+\Psi_{\mathrm{P}}+\Psi \mathrm{g}+\Psi \mathrm{m}\) overall \(\Psi\) of the soil: \(-2.1\) MPa solute potential of the plant鈥檚 cell contents: -0.12MPa pressure potential \((\Psi p)\) of the plant鈥檚 cells: -2.3 MPa Is Plant X a good candidate for introduction to the salt marsh? a. Yes, because the overall water potential of the plant is less negative than the water potential of the soil. b. No, because the overall water potential of the plant is less negative than the water potential of the soil. c. Yes, because the overall water potential of the plant is more negative than the water potential of the soil. d. No, because the overall water potential of the plant is more negative than the water potential of the soil.
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